hi, I have diabetes because of pancreatitus too.... I have a small amount of cadburys milk chocolate, sorry, not the entire bar anymore! But a heroes or a small kids sized one (say a freddo or slim dairy milk) doesnt affect my sugars as bad as a piece of fruit does - personally I would prefer the fruit.
I refuse to allow my life to be taken over by my diabetes nor restrict myself from what I want to eat. That sounds like I don't care, but diabetes is now just a part of my lifestyle and I have learned to choose my foods carefully to allow myself that small treat when I hit the point of no return where only chocolate will do.
As an idea, I have a sugar free lollipop or sugar free sweets on me at all times - just be careful with the sweeteners in them, too many made me ill!! But I like hardboiled sweets most as they are small but last longer and get you over the cravings.
I am meds and insulin controlled but its a matter of trial and error and finding what your body can and cannot cope with. I can (and when first diagnosed did in my denial stage) actually eat a massive chocolate bar and be ok, but if I eat an apple I am crippled with pancreatic pain - but moderating my bad food intake has helped me lose weight (though had no affect on my diabetes). Its a massive learning curve. As for sugar craving diminishing... not happened yet for me after 2 1/2 years, a better than halving in my hba1c and much lower (from 23-30 to 5-8) blood sugars that I maintain through the day.
I hate dark chocolate and diabetic chocolate plays havoc on my system - I would rather have a small amount of what I actually like than "treat" myself to something I don't enjoy. I tell my specialist nurse this and she tells me it is preferable to feeling resentful and ultimately gorging myself on rubbish... yes I have been there and done that too.
My diabetic nurse told me to check my sugars after I ate it, if I am over 9 and I eat it again she can read me the riot act, the only time I am over 9 these days is when I give into my cravings for fruit... a 100ml glass of juice put me 10 pts up (I trialled this to try to assist in my cholesterol management btw, not because I wanted it as I know juices are bad, seems the nurse in my doctors is not quite so bright).
Every diabetic is different and there are no set labels, no set treatment and no perfect advice. I would check bloods before and after, but have a small piece of what you want - how I reduced my chocolate intake was buy a bar but gave half away immediately upon opening it. I basically relied on my friends and family (and work mates) to help me out by taking that half away from me immediately.
I just started a new treatment so chocolate isnt even an option now, but good luck.